Few product shots with silver Czj Biotar 58mm f/2.0 with 10 blades to share with you all. Unlike modern lens, the aperture has no stops, it move continuously as you turn the aperture ring. You see round circular opening as you move through different apertures.
Blades look like a flower
I took product shot of the silver lens with my first SLR film camera with Praktica MTL5
- I do not know that this oddie is actually a preset lens. There is a hidden preset ring that one needs to pull out away from the camera for setting the desired aperture.